Pet climbing frame



FIG. 1 is a front view of a pet climbing frame, showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left elevation view thereof;

FIG. 6 is a right elevation view thereof; and,

FIG. 7 is a perspective view thereof.

The broken lines in the drawings depict portions of the pet climbing frame that form no part of the claimed design. 

CLAIM The ornamental design for a pet climbing frame, as shown and described. 